Method and apparatus for compensating data image reproduced from holographic system

(19)

(11)

EP 1 587 073 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	08.11.2006 Bulletin 2006/45

(43)	Date of publication A2:
	19.10.2005 Bulletin 2005/42

(21)	Application number: 05007904.5

(22)	Date of filing: 11.04.2005

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International Patent Classification (IPC):

G11B 7/0065^(2006.01)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
	Designated Extension States:
	AL BA HR LV MK YU

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Priority:

12.04.2004 KR 2004025067

(71)	Applicant: Daewoo Electronics Corporation
	Seoul (KR)

(72)	Inventor:
	Kang, Byung-Bok Seoul (KR)

(74)	Representative: Jacoby, Georg et al
	Samson & Partner, Widenmayerstrasse 5 80538 München 80538 München (DE)

(54)	Method and apparatus for compensating data image reproduced from holographic system

(57) The present invention provides a method and apparatus for preprocessing a page image reproduced from a storage medium in a holographic system. The present invention calculates pixel sums for each lines in the page image to select a maximum sum, calculates a modified maximum sum using the modified maximum sum and its neighboring sums, determines a compensation location for distorted pixels using the modified maximum sum and performs over-sampling a data image with reference to the compensation location of magnified pixels, to thereby compensate the data image with high precision in sub-pixels.

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